Waterproof construction material



July 7, 1931.

J. H. PLUNKETT v WATERPROOF CONSTRUCTION MATERIAL Filed Aug. 12., 1929 INVENTOR J05?) H Flu/fire?!" ATTORNEY Patented July 7, 1931 UNITED; STATES:

PATENT OFFICE JOHN HOMER PLUNKETT, OF BEVERLY HILLS, CALIFORNIA, ASSIGNOR TO FLINTKOTE COMPANY, or Bos'rou, MA

cnusn'r'r's SSACI-IUSETTS, A CORPORATION OF MASSA- WATERPROOF CONSTRUCTION MATERIAL Application filed-August 12, 1929. Serial No. 385,098.

This invention relates to a building ma-' terial especially suitable forthermally insu: lating and waterproofing walls, ceilings, or the like. v

It is an object of my invention to provide a construction material of the character described which is inexpensive to manufacture and which can be rapidly and economically applied in use.

. Another object of my mventionis to provide a construction materialwhichis capable ofrapid application to walls, cellmg's, etc.

to form a barrier thereon against the -en-- water so that when the surfacing material such as plaster or stucco is appli d thereover,

the latter will be permanently onded to the backing by the-suction incident to the abstraction of water bythe porous membrane from the plastic stucco or plastera Still a further object of the invention resides in the provision of a construction material of the type describedhaving indicia "suitably printed thereonto guideithe workman in properly and rapidlyapplying the ceiling or the like.

Still other ob'ects from the followingmore detailed description and froni accompanying drawings, j in 50. Figure 2 is a' vlew 1n perspective showing of 'the invention as well as numerous advantages thereof will appear the arrangement of the material in the successive courses. 1

Figure 3 is a vertical section through a completed wall in which my novel material is. utilized, and

Figure 4 is a somewhat magnified view illustrating the material per se.

According to m invention, sheets I of felted fibrous material, such for example as roofing felt made from rag fibres or the like in-a well known manner to produce a bibulous sheet, is first saturated thoroughly with a waterproofing substance as for exam le asphalt of about 130 to 150 F. melting point. This saturation may be readily accomplished by, immersing the sheet for a substantial period of time in a bath of the molten asphalt maintained at a temperature such that the asphalt is sufficiently fluid to enter the pores and interstices of the felted fibrous sheet and thereb pletely impregnate the latter. To t is end the temperature of the bath will generally be maintained at approximately 400 to 420 F. -After the sheet has been saturated, it is then coated on both faces thereof as by means of coatingrolls or sprays with a waterproofing material similar in its nature to that employed for impregnating the sheet 'but of somewhat higher melting point,

as for example-200 to 220 F. This coati'ng material is maintained at such a temperature that it will remain on the surfaces of the sheet in relatively-thin layers, and for this purpose the coating material, when Lemploying asphalt of 200 to 220 F, will Qgenerally bemaintained and supplied to material to a foundationfsuchas a wall, the surfaces of the sheet at about 380- 4:10 F. g a s The thus impregnated and coated sheet provides a foundation or backing. which for all practical purposes within the purview of my invention is entirely waterproof ,aswell as dampproof. For achieving the principal objects of my invention, however,

I aflix to one surface of the impregnated and coated backing reinforcing membrane of tough durable paper, having a relatively smooth surface finish, but which is sufiiciently porous andwater absorptive to act as coman effective key for bonding plaster, stucco or the like to the backing. It is essential also thatthis surface membrane should not be subject to readydisintegration as by abrasion, for in that event, the asphaltic coating fulfills the aforenamed requirements, at a minimum of cost. While kraft paper is sufficiently water absorptive for the purposes above named, its nature is such that it can be readily applied to the coated face of the backingwithout any of the asphaltic coating material striking through the kraft. At the same time it is sufiiciently tough to reinforce the impregnated and coated base. It will be understood, however, that any sheet made from vegetable fibers and similar to kraft paper in respect to the aforenamed pro erties, maybe used. i

The kra t paper which is preferably thinner than the backing of saturated and coated felt, may be combined with a surface of the impregnated and coated backing sheet of felt at a convenient time after the coating material has been applied to the sheet and before it has entirely cooled and set, so that the sticky nature of the asphalt coatin may act as an adhesive for the sheet of, raft. The face of the backing sheet opposite that to which the kraft is affixed, may, if desired, be dusted with powdered mica, talc or the like to relieve this face of the normal tackiness characteristic of the asphaltic coating material. The sheet as thus prepared may be made 1n any desired lengths and of suitable widths, and wound into rolls for shipment.

In Figure 4, I have depicted the structure of this material prepared as above set forth. Numeral 10 indicates the sheet as a whole, numeral 11 indicates the base or foundation of felt, such as ordinary roofing felt, saturated with asphalt or similar waterproofing substance, and numerals 12, 12a indicate the layers of asphalt coating materlal upon the op osite faces of the foundation sheet 11. he sheet of kraft paper aflixed to one of the :coated faces of the foundation is indicated at 13 while fine mineral, such as powdered talc or mica u on the opposite coated face thereof is indicated at 14.

The material. as thus constructed has been particularly devised and formed especially suitable for thermally insulating waterproofing walls, ceilings or the like. For this purpose, the sheetsare preferably applied in courses to studding or the like with the face of the sheet carrying the kraft paper outermost, and with a margin of each sheet sheet of kraft 13, near one margin thereof.

-When the band 16 is made relatively Wide, the workman may be directed to lay the successive courses either to the upper or lower boundaries of the band, according to the requirements of the user, but in either case by positioning the band at an appropriate distance from one margin of the sheet, the overlap necessaryto provide adequate protection against leaks, etc. will be afforded.-

An important feature of the material constructed in accordance with my invention resides in its perfect bonding qualities with plaster, stucco, or the like, due to the waterabsorptive properties of the kraft paper embodied therein, and the conse uent production of a keying suction whic enables the plastic or stucco permanently to adhere to the surface thereof. Figure 3. illustrates several courses of my improved insulating and water-proofing material applied to an interior wall and surmounted by a layer of plaster 17, the plaster being applied over. the kraft covered face of the backing 10, which as already stated faces outermost; and serves as a bonding medium for the plaster.

For exterior work, such as exterior stucco and cement, the material of my invention serves admirably as an insulating and water-proofing membrane behind the wire both ordinarily employed in exterior work.

Furthermore, this material is suitable for use as a water-proofing and insulating liner for brick, veneer, or wood frame constructions, and hence will find wide application in the building industry as a water-proofing and thermal insulation medium.

I claim as my invention:

1. A building material suitable as a backing for plaster, stucco and the like, comprising lengths of felted fibrous material saturated with a water-proofing substance and coated on its surfaces with a layer of bituminous material, one of saidcoated surfaces having aflixed thereto throughout its entire extent, a sheet of water-absorptive, smooth, and relatively tough paper.

2. A building material suitable as abacking for plaster, stucco and the like, comprising lengths of felted fibrous material saturated with a water-proofing substance and coated on its surfaces with a layer of bituminous material, one of said coated surfaces having aflixed thereto throughout its entire extent, a sheet of kraft paper.

3. A building materialof the character described, comprising a felted fibrous foundation saturated with a waterroofing substance and coated on its sur aces with a layer of bituminous material, one of said coated faces having afiixed'thereto through} out its entire extent, a sheet of water absorptive, smooth and relatively tough pa said sheet of paper being relatively thinnerv than said foundation.

5. A building material suitable as a back ing for plaster, stucco and the like, comprising lengths of felted fibrous material saturated with a water-proofing substance and coated on its surfaces with a layer of bitu-- 9. In combination with 7 structure of plaster, stucco, or:the like, an underlining therefore, comprising partially overlappe sheets of fibrous felt, each of said sheets be-- ing impregnated with a water-proofing substance and coated on its surfaces with a layer of bituminous material, the coated surface adjacent the plaster, having aflixed thereto throughout'its entire extent, a sheet of kraft paper having'a guide line imprinted thereon parallel to and spacedfrom one of the longitudinal edges thereof, the successive overlapping sheets having the lower edges thereof positionedalong one of the boundaries of said guide line on the subjacent sheet. Signed at Los Angeles, in the county of Los Angeles,

second day ofAugust, A. D. 1929.- 5 JOHN HOMER PLUNKETT.

and State of California, this minous material, one of said coated surfaces having affixed thereto throughout its entire extent, a sheet of water-absorptive, smooth, and relatively tough paper,isaid sheet of paper having. a narrow guide. band imprinted thereon adjacent one 'of its longitudinal edges.

6. A building material suitable as a back- I ing for plaster, stucco and the like, comprising leiigths of' felted fibrous material. saturated with a water-proofing substance and coated on its surfaces with a layer of bituminbus material, one of said coated-surfaces having afiixed thereto throughout its entire extent, a' sheet of kraft paper, said sheet of kraft having a narrow guide band imprinted thereon.

7. In combination with structure of plaster, stucco, or the like,"an underlining therefore comprising partially overlap ed sheets of fibrous felt, each of said sheets be ing impregnatedwith a water-proofing substance and coated on its surfaceswith a layer of bituminous material, the coated surface adjacent the plaster, having aflixed thereto throughout its entire extent, a sheet of water-absorptive, smooth, tough paper.

8. In combination with a structure of plaster, stucco,or the. like, an underlining therefore, comprising partially overlapped and relatively sheets'of fibrous feltilea'ch of said sheets be- 7 ing impregnated wit a water-proofing substance and coated on its surfaces with a layer of bituminous material, the coated surface adjacent the plaster, having aflixed thereto entire extent, a sheet of kraft throughout its paper.

DISCLAIMER,

1,81'3,081.J0lm Homer Plunkett, Beverly Hills, Calif. WATERPROOF CONSTRUCTION MATERIAL; Patent dated July 7, 1931: Disclaimer filed May 9, 1935, by the assignee, The Patent and Licensing Corporation.

Hereby enters this disclaimer to that part of the specification of the aforesaid Letters Patent which consists of claims 1, 2, 3, 4, 7 and8 which are in the following words, to wit:

1. A building material suitable as a backing for plaster, comprising lengths of felted fibrous material saturated with a water-proofing subabsorptive, smooth, and relatively tough paper.

2. A building material suitable as a backing for plaster, stucco and the like,

comprising lengths of felted fibrous material saturated with a water-proofing substance and coated on its surfaces with a layer of bituminous material, one of said coated surfaces having affixed thereto throughout its entire extent, a pa er.

p 3. A building material of the character described, comprising a felted fibrous foundation saturated with a water-proofing substance and coated on its, surfaces with a'layer of bituminous material, one of said coated faces having affixed thereto throughout its entire extent, a sheet of water-absorptive, smooth and relatively thinner than said foundation. 4 A building material of the character described, comprising a felted fibrous a layer of bituminous material, the coated surface adjacent the plaster, thereto throughout its entire extent, a sheet of water-absorptive, smooth, and'rela- ,tively tough paper.

8. In combinationwith a structure of sheet of kraft 

